• Home
  • History
  • Annotate
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright (C) 2013 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include "config.h"
32 #include "bindings/core/v8/ScriptPreprocessor.h"
33 
34 #include "bindings/core/v8/ScriptController.h"
35 #include "bindings/core/v8/ScriptSourceCode.h"
36 #include "bindings/core/v8/ScriptValue.h"
37 #include "bindings/core/v8/V8Binding.h"
38 #include "bindings/core/v8/V8ScriptRunner.h"
39 #include "core/frame/FrameConsole.h"
40 #include "core/frame/FrameHost.h"
41 #include "core/frame/LocalFrame.h"
42 #include "core/inspector/ConsoleMessage.h"
43 #include "wtf/TemporaryChange.h"
44 
45 namespace blink {
46 
ScriptPreprocessor(const ScriptSourceCode & preprocessorSourceCode,LocalFrame * frame)47 ScriptPreprocessor::ScriptPreprocessor(const ScriptSourceCode& preprocessorSourceCode, LocalFrame* frame)
48     : m_isPreprocessing(false)
49 {
50     RefPtr<DOMWrapperWorld> world = DOMWrapperWorld::ensureIsolatedWorld(ScriptPreprocessorIsolatedWorldId, DOMWrapperWorld::mainWorldExtensionGroup);
51     m_scriptState = ScriptState::from(toV8Context(frame, *world));
52 
53     v8::HandleScope handleScope(m_scriptState->isolate());
54     ASSERT(frame);
55     v8::TryCatch tryCatch;
56     tryCatch.SetVerbose(true);
57     Vector<ScriptSourceCode> sources;
58     sources.append(preprocessorSourceCode);
59     Vector<v8::Local<v8::Value> > scriptResults;
60     frame->script().executeScriptInIsolatedWorld(ScriptPreprocessorIsolatedWorldId, sources, DOMWrapperWorld::mainWorldExtensionGroup, &scriptResults);
61 
62     if (scriptResults.size() != 1) {
63         frame->console().addMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, "ScriptPreprocessor internal error, one ScriptSourceCode must give exactly one result."));
64         return;
65     }
66 
67     v8::Local<v8::Value> preprocessorFunction = scriptResults[0];
68     if (preprocessorFunction.IsEmpty() || !preprocessorFunction->IsFunction()) {
69         frame->console().addMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, "The preprocessor must compile to a function."));
70         return;
71     }
72     m_preprocessorFunction.set(m_scriptState->isolate(), v8::Handle<v8::Function>::Cast(preprocessorFunction));
73 }
74 
preprocessSourceCode(const String & sourceCode,const String & sourceName)75 String ScriptPreprocessor::preprocessSourceCode(const String& sourceCode, const String& sourceName)
76 {
77     if (!isValid())
78         return sourceCode;
79 
80     return preprocessSourceCode(sourceCode, sourceName, v8::Undefined(m_scriptState->isolate()));
81 }
82 
preprocessSourceCode(const String & sourceCode,const String & sourceName,const String & functionName)83 String ScriptPreprocessor::preprocessSourceCode(const String& sourceCode, const String& sourceName, const String& functionName)
84 {
85     if (!isValid())
86         return sourceCode;
87 
88     v8::Handle<v8::String> functionNameString = v8String(m_scriptState->isolate(), functionName);
89     return preprocessSourceCode(sourceCode, sourceName, functionNameString);
90 }
91 
preprocessSourceCode(const String & sourceCode,const String & sourceName,v8::Handle<v8::Value> functionName)92 String ScriptPreprocessor::preprocessSourceCode(const String& sourceCode, const String& sourceName, v8::Handle<v8::Value> functionName)
93 {
94     if (!isValid())
95         return sourceCode;
96 
97     v8::Isolate* isolate = m_scriptState->isolate();
98     ScriptState::Scope scope(m_scriptState.get());
99 
100     v8::Handle<v8::String> sourceCodeString = v8String(isolate, sourceCode);
101     v8::Handle<v8::String> sourceNameString = v8String(isolate, sourceName);
102     v8::Handle<v8::Value> argv[] = { sourceCodeString, sourceNameString, functionName};
103 
104     v8::TryCatch tryCatch;
105     tryCatch.SetVerbose(true);
106     TemporaryChange<bool> isPreprocessing(m_isPreprocessing, true);
107     v8::Handle<v8::Value> resultValue = V8ScriptRunner::callAsFunction(isolate, m_preprocessorFunction.newLocal(isolate), m_scriptState->context()->Global(), WTF_ARRAY_LENGTH(argv), argv);
108 
109     if (!resultValue.IsEmpty() && resultValue->IsString())
110         return toCoreStringWithNullCheck(resultValue.As<v8::String>());
111 
112     return sourceCode;
113 }
114 
115 } // namespace blink
116